物理化学学报 >> 1999, Vol. 15 >> Issue (03): 265-268.doi: 10.3866/PKU.WHXB19990313

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RbCl由H2O至混合溶剂(H2O-DMF)标准迁移熵的测定

李林尉, 褚德萤, 刘瑞麟   

  1. 北京大学化学与分子工程学院，北京 100871|聊城师范学院化学系，聊城 252059
  • 收稿日期:1998-01-19 修回日期:1998-06-04 发布日期:1999-03-15
  • 通讯作者:

Determinstion of Standard Transfer Entropies of RbCl from H2O to Mixtures of H2O-DMF

Li Lin-Wei, Chu De-Ying, Liu Rui-Lin   

  1. College of Chemistry and Molecular Engineering,Peking University,Beijing 100871|Department of Chemistry,Liaocheng Teachers College,Liaocheng City 252059
  • Received:1998-01-19 Revised:1998-06-04 Published:1999-03-15
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关键词: RbCl, 标准迁移熵, 离子溶剂化, 溶剂结构

Abstract:

The standard electromotive forces of the reversible cells consisted of the Corning monovalent general cation selective electrode (M + ISE) and chloride selective electrode (Cl ISE), namely
Cl --ISE｜RbCl( m ),H 2O(1- x ),DMF( x )｜M +-ISE
have been measured, and the standard free energies of transfer(ΔStΘ) of RbCl from H2O to mixtures of H2O DMF have been calculated, the standard transfer entropies(ΔStΘ) have been also calculated from temperature coefficients ofΔStΘof RbCl at seven temperatures from 283.15 K to 318.15 K. The behavior of change ofΔStΘof RbCl with experimental temperature and mole fraction ( x ) of DMF in the mixed solvents and its influence on the structure of the mixed solvents were discussed on the basis of solvation theory ofelectrolyte solution.

Key words: RbCl, Standard transfer entropies, Ionic solvation, Structure of solvent